[fio.git] / crc / sha256.c

/*
 * Cryptographic API.
 *
 * SHA-256, as specified in
 * http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf
 *
 * SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>.
 *
 * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option) 
 * any later version.
 *
 */
#include <string.h>

#include "../lib/bswap.h"
#include "sha256.h"

#define SHA256_DIGEST_SIZE	32
#define SHA256_HMAC_BLOCK_SIZE	64

static inline uint32_t Ch(uint32_t x, uint32_t y, uint32_t z)
{
	return z ^ (x & (y ^ z));
}

static inline uint32_t Maj(uint32_t x, uint32_t y, uint32_t z)
{
	return (x & y) | (z & (x | y));
}

#define e0(x)       (ror32(x, 2) ^ ror32(x,13) ^ ror32(x,22))
#define e1(x)       (ror32(x, 6) ^ ror32(x,11) ^ ror32(x,25))
#define s0(x)       (ror32(x, 7) ^ ror32(x,18) ^ (x >> 3))
#define s1(x)       (ror32(x,17) ^ ror32(x,19) ^ (x >> 10))

#define H0         0x6a09e667
#define H1         0xbb67ae85
#define H2         0x3c6ef372
#define H3         0xa54ff53a
#define H4         0x510e527f
#define H5         0x9b05688c
#define H6         0x1f83d9ab
#define H7         0x5be0cd19

static inline uint32_t ror32(uint32_t word, unsigned int shift)
{
	 return (word >> shift) | (word << (32 - shift));
}

static inline void LOAD_OP(int I, uint32_t *W, const uint8_t *input)
{
	W[I] = __be32_to_cpu(((uint32_t *)(input))[I]);
}

static inline void BLEND_OP(int I, uint32_t *W)
{
	W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
}

static void sha256_transform(uint32_t *state, const uint8_t *input)
{
	uint32_t a, b, c, d, e, f, g, h, t1, t2;
	uint32_t W[64];
	int i;

	/* load the input */
	for (i = 0; i < 16; i++)
		LOAD_OP(i, W, input);

	/* now blend */
	for (i = 16; i < 64; i++)
		BLEND_OP(i, W);

	/* load the state into our registers */
	a=state[0];  b=state[1];  c=state[2];  d=state[3];
	e=state[4];  f=state[5];  g=state[6];  h=state[7];

	/* now iterate */
	t1 = h + e1(e) + Ch(e,f,g) + 0x428a2f98 + W[ 0];
	t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
	t1 = g + e1(d) + Ch(d,e,f) + 0x71374491 + W[ 1];
	t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
	t1 = f + e1(c) + Ch(c,d,e) + 0xb5c0fbcf + W[ 2];
	t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
	t1 = e + e1(b) + Ch(b,c,d) + 0xe9b5dba5 + W[ 3];
	t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
	t1 = d + e1(a) + Ch(a,b,c) + 0x3956c25b + W[ 4];
	t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
	t1 = c + e1(h) + Ch(h,a,b) + 0x59f111f1 + W[ 5];
	t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
	t1 = b + e1(g) + Ch(g,h,a) + 0x923f82a4 + W[ 6];
	t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
	t1 = a + e1(f) + Ch(f,g,h) + 0xab1c5ed5 + W[ 7];
	t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;

	t1 = h + e1(e) + Ch(e,f,g) + 0xd807aa98 + W[ 8];
	t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
	t1 = g + e1(d) + Ch(d,e,f) + 0x12835b01 + W[ 9];
	t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
	t1 = f + e1(c) + Ch(c,d,e) + 0x243185be + W[10];
	t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
	t1 = e + e1(b) + Ch(b,c,d) + 0x550c7dc3 + W[11];
	t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
	t1 = d + e1(a) + Ch(a,b,c) + 0x72be5d74 + W[12];
	t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
	t1 = c + e1(h) + Ch(h,a,b) + 0x80deb1fe + W[13];
	t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
	t1 = b + e1(g) + Ch(g,h,a) + 0x9bdc06a7 + W[14];
	t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
	t1 = a + e1(f) + Ch(f,g,h) + 0xc19bf174 + W[15];
	t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;

	t1 = h + e1(e) + Ch(e,f,g) + 0xe49b69c1 + W[16];
	t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
	t1 = g + e1(d) + Ch(d,e,f) + 0xefbe4786 + W[17];
	t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
	t1 = f + e1(c) + Ch(c,d,e) + 0x0fc19dc6 + W[18];
	t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
	t1 = e + e1(b) + Ch(b,c,d) + 0x240ca1cc + W[19];
	t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
	t1 = d + e1(a) + Ch(a,b,c) + 0x2de92c6f + W[20];
	t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
	t1 = c + e1(h) + Ch(h,a,b) + 0x4a7484aa + W[21];
	t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
	t1 = b + e1(g) + Ch(g,h,a) + 0x5cb0a9dc + W[22];
	t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
	t1 = a + e1(f) + Ch(f,g,h) + 0x76f988da + W[23];
	t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;

	t1 = h + e1(e) + Ch(e,f,g) + 0x983e5152 + W[24];
	t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
	t1 = g + e1(d) + Ch(d,e,f) + 0xa831c66d + W[25];
	t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
	t1 = f + e1(c) + Ch(c,d,e) + 0xb00327c8 + W[26];
	t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
	t1 = e + e1(b) + Ch(b,c,d) + 0xbf597fc7 + W[27];
	t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
	t1 = d + e1(a) + Ch(a,b,c) + 0xc6e00bf3 + W[28];
	t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
	t1 = c + e1(h) + Ch(h,a,b) + 0xd5a79147 + W[29];
	t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
	t1 = b + e1(g) + Ch(g,h,a) + 0x06ca6351 + W[30];
	t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
	t1 = a + e1(f) + Ch(f,g,h) + 0x14292967 + W[31];
	t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;

	t1 = h + e1(e) + Ch(e,f,g) + 0x27b70a85 + W[32];
	t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
	t1 = g + e1(d) + Ch(d,e,f) + 0x2e1b2138 + W[33];
	t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
	t1 = f + e1(c) + Ch(c,d,e) + 0x4d2c6dfc + W[34];
	t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
	t1 = e + e1(b) + Ch(b,c,d) + 0x53380d13 + W[35];
	t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
	t1 = d + e1(a) + Ch(a,b,c) + 0x650a7354 + W[36];
	t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
	t1 = c + e1(h) + Ch(h,a,b) + 0x766a0abb + W[37];
	t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
	t1 = b + e1(g) + Ch(g,h,a) + 0x81c2c92e + W[38];
	t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
	t1 = a + e1(f) + Ch(f,g,h) + 0x92722c85 + W[39];
	t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;

	t1 = h + e1(e) + Ch(e,f,g) + 0xa2bfe8a1 + W[40];
	t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
	t1 = g + e1(d) + Ch(d,e,f) + 0xa81a664b + W[41];
	t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
	t1 = f + e1(c) + Ch(c,d,e) + 0xc24b8b70 + W[42];
	t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
	t1 = e + e1(b) + Ch(b,c,d) + 0xc76c51a3 + W[43];
	t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
	t1 = d + e1(a) + Ch(a,b,c) + 0xd192e819 + W[44];
	t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
	t1 = c + e1(h) + Ch(h,a,b) + 0xd6990624 + W[45];
	t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
	t1 = b + e1(g) + Ch(g,h,a) + 0xf40e3585 + W[46];
	t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
	t1 = a + e1(f) + Ch(f,g,h) + 0x106aa070 + W[47];
	t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;

	t1 = h + e1(e) + Ch(e,f,g) + 0x19a4c116 + W[48];
	t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
	t1 = g + e1(d) + Ch(d,e,f) + 0x1e376c08 + W[49];
	t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
	t1 = f + e1(c) + Ch(c,d,e) + 0x2748774c + W[50];
	t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
	t1 = e + e1(b) + Ch(b,c,d) + 0x34b0bcb5 + W[51];
	t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
	t1 = d + e1(a) + Ch(a,b,c) + 0x391c0cb3 + W[52];
	t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
	t1 = c + e1(h) + Ch(h,a,b) + 0x4ed8aa4a + W[53];
	t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
	t1 = b + e1(g) + Ch(g,h,a) + 0x5b9cca4f + W[54];
	t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
	t1 = a + e1(f) + Ch(f,g,h) + 0x682e6ff3 + W[55];
	t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;

	t1 = h + e1(e) + Ch(e,f,g) + 0x748f82ee + W[56];
	t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
	t1 = g + e1(d) + Ch(d,e,f) + 0x78a5636f + W[57];
	t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
	t1 = f + e1(c) + Ch(c,d,e) + 0x84c87814 + W[58];
	t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
	t1 = e + e1(b) + Ch(b,c,d) + 0x8cc70208 + W[59];
	t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
	t1 = d + e1(a) + Ch(a,b,c) + 0x90befffa + W[60];
	t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
	t1 = c + e1(h) + Ch(h,a,b) + 0xa4506ceb + W[61];
	t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
	t1 = b + e1(g) + Ch(g,h,a) + 0xbef9a3f7 + W[62];
	t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
	t1 = a + e1(f) + Ch(f,g,h) + 0xc67178f2 + W[63];
	t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;

	state[0] += a; state[1] += b; state[2] += c; state[3] += d;
	state[4] += e; state[5] += f; state[6] += g; state[7] += h;

	/* clear any sensitive info... */
	a = b = c = d = e = f = g = h = t1 = t2 = 0;
	memset(W, 0, 64 * sizeof(uint32_t));
}

void fio_sha256_init(struct fio_sha256_ctx *sctx)
{
	sctx->state[0] = H0;
	sctx->state[1] = H1;
	sctx->state[2] = H2;
	sctx->state[3] = H3;
	sctx->state[4] = H4;
	sctx->state[5] = H5;
	sctx->state[6] = H6;
	sctx->state[7] = H7;
	sctx->count = 0;
}

void fio_sha256_update(struct fio_sha256_ctx *sctx, const uint8_t *data,
		       unsigned int len)
{
	unsigned int partial, done;
	const uint8_t *src;

	partial = sctx->count & 0x3f;
	sctx->count += len;
	done = 0;
	src = data;

	if ((partial + len) > 63) {
		if (partial) {
			done = -partial;
			memcpy(sctx->buf + partial, data, done + 64);
			src = sctx->buf;
		}

		do {
			sha256_transform(sctx->state, src);
			done += 64;
			src = data + done;
		} while (done + 63 < len);

		partial = 0;
	}
	memcpy(sctx->buf + partial, src, len - done);
}

void fio_sha256_final(struct fio_sha256_ctx *sctx)
{
	uint64_t bits;
	unsigned int index, pad_len;
	int i;
	static const uint8_t padding[64] = { 0x80, };

	/* Save number of bits */
	bits = (uint64_t) sctx->count << 3;

	/* Pad out to 56 mod 64. */
	index = sctx->count & 0x3f;
	pad_len = (index < 56) ? (56 - index) : ((64+56) - index);
	fio_sha256_update(sctx, padding, pad_len);

	/* Append length (before padding) */
	fio_sha256_update(sctx, (const uint8_t *)&bits, sizeof(bits));

	/* Store state in digest */
	for (i = 0; i < 8; i++)
		sctx->buf[i] = sctx->state[i];
}
Commit	Line	Data
cd14cc10 JA	1	/*
	2	* Cryptographic API.
	3	*
	4	* SHA-256, as specified in
	5	* http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf
	6	*
	7	* SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>.
	8	*
	9	* Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
	10	* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
	11	* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
	12	*
	13	* This program is free software; you can redistribute it and/or modify it
	14	* under the terms of the GNU General Public License as published by the Free
	15	* Software Foundation; either version 2 of the License, or (at your option)
	16	* any later version.
	17	*
	18	*/
	19	#include <string.h>
cd14cc10	20
00fb3c8d	21	#include "../lib/bswap.h"
cd14cc10 JA	22	#include "sha256.h"
cd14cc10 JA	23
cd14cc10 JA	24	#define SHA256_DIGEST_SIZE 32
	25	#define SHA256_HMAC_BLOCK_SIZE 64
	26
	27	static inline uint32_t Ch(uint32_t x, uint32_t y, uint32_t z)
	28	{
	29	return z ^ (x & (y ^ z));
	30	}
	31
	32	static inline uint32_t Maj(uint32_t x, uint32_t y, uint32_t z)
	33	{
	34	return (x & y) \| (z & (x \| y));
	35	}
	36
	37	#define e0(x) (ror32(x, 2) ^ ror32(x,13) ^ ror32(x,22))
	38	#define e1(x) (ror32(x, 6) ^ ror32(x,11) ^ ror32(x,25))
	39	#define s0(x) (ror32(x, 7) ^ ror32(x,18) ^ (x >> 3))
	40	#define s1(x) (ror32(x,17) ^ ror32(x,19) ^ (x >> 10))
	41
	42	#define H0 0x6a09e667
	43	#define H1 0xbb67ae85
	44	#define H2 0x3c6ef372
	45	#define H3 0xa54ff53a
	46	#define H4 0x510e527f
	47	#define H5 0x9b05688c
	48	#define H6 0x1f83d9ab
	49	#define H7 0x5be0cd19
	50
	51	static inline uint32_t ror32(uint32_t word, unsigned int shift)
	52	{
	53	return (word >> shift) \| (word << (32 - shift));
	54	}
	55
	56	static inline void LOAD_OP(int I, uint32_t W, const uint8_t input)
	57	{
	58	W[I] = __be32_to_cpu(((uint32_t *)(input))[I]);
	59	}
	60
	61	static inline void BLEND_OP(int I, uint32_t *W)
	62	{
	63	W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
	64	}
	65
	66	static void sha256_transform(uint32_t state, const uint8_t input)
	67	{
	68	uint32_t a, b, c, d, e, f, g, h, t1, t2;
	69	uint32_t W[64];
	70	int i;
	71
	72	/* load the input */
	73	for (i = 0; i < 16; i++)
	74	LOAD_OP(i, W, input);
	75
	76	/* now blend */
	77	for (i = 16; i < 64; i++)
	78	BLEND_OP(i, W);
	79
	80	/* load the state into our registers */
	81	a=state[0]; b=state[1]; c=state[2]; d=state[3];
	82	e=state[4]; f=state[5]; g=state[6]; h=state[7];
	83
	84	/* now iterate */
	85	t1 = h + e1(e) + Ch(e,f,g) + 0x428a2f98 + W[ 0];
	86	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	87	t1 = g + e1(d) + Ch(d,e,f) + 0x71374491 + W[ 1];
88	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
89	t1 = f + e1(c) + Ch(c,d,e) + 0xb5c0fbcf + W[ 2];
90	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
91	t1 = e + e1(b) + Ch(b,c,d) + 0xe9b5dba5 + W[ 3];
92	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
93	t1 = d + e1(a) + Ch(a,b,c) + 0x3956c25b + W[ 4];
94	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
95	t1 = c + e1(h) + Ch(h,a,b) + 0x59f111f1 + W[ 5];
96	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
97	t1 = b + e1(g) + Ch(g,h,a) + 0x923f82a4 + W[ 6];
98	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
99	t1 = a + e1(f) + Ch(f,g,h) + 0xab1c5ed5 + W[ 7];
100	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
101
102	t1 = h + e1(e) + Ch(e,f,g) + 0xd807aa98 + W[ 8];
103	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
104	t1 = g + e1(d) + Ch(d,e,f) + 0x12835b01 + W[ 9];
105	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
106	t1 = f + e1(c) + Ch(c,d,e) + 0x243185be + W[10];
107	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
108	t1 = e + e1(b) + Ch(b,c,d) + 0x550c7dc3 + W[11];
109	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
110	t1 = d + e1(a) + Ch(a,b,c) + 0x72be5d74 + W[12];
111	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
112	t1 = c + e1(h) + Ch(h,a,b) + 0x80deb1fe + W[13];
113	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
114	t1 = b + e1(g) + Ch(g,h,a) + 0x9bdc06a7 + W[14];
115	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
116	t1 = a + e1(f) + Ch(f,g,h) + 0xc19bf174 + W[15];
117	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
118
119	t1 = h + e1(e) + Ch(e,f,g) + 0xe49b69c1 + W[16];
120	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
121	t1 = g + e1(d) + Ch(d,e,f) + 0xefbe4786 + W[17];
122	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
123	t1 = f + e1(c) + Ch(c,d,e) + 0x0fc19dc6 + W[18];
124	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
125	t1 = e + e1(b) + Ch(b,c,d) + 0x240ca1cc + W[19];
126	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
127	t1 = d + e1(a) + Ch(a,b,c) + 0x2de92c6f + W[20];
128	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
129	t1 = c + e1(h) + Ch(h,a,b) + 0x4a7484aa + W[21];
130	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
131	t1 = b + e1(g) + Ch(g,h,a) + 0x5cb0a9dc + W[22];
132	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
133	t1 = a + e1(f) + Ch(f,g,h) + 0x76f988da + W[23];
134	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
135
136	t1 = h + e1(e) + Ch(e,f,g) + 0x983e5152 + W[24];
137	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
138	t1 = g + e1(d) + Ch(d,e,f) + 0xa831c66d + W[25];
139	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
140	t1 = f + e1(c) + Ch(c,d,e) + 0xb00327c8 + W[26];
141	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
142	t1 = e + e1(b) + Ch(b,c,d) + 0xbf597fc7 + W[27];
143	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
144	t1 = d + e1(a) + Ch(a,b,c) + 0xc6e00bf3 + W[28];
145	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
146	t1 = c + e1(h) + Ch(h,a,b) + 0xd5a79147 + W[29];
147	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
148	t1 = b + e1(g) + Ch(g,h,a) + 0x06ca6351 + W[30];
149	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
150	t1 = a + e1(f) + Ch(f,g,h) + 0x14292967 + W[31];
151	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
152
153	t1 = h + e1(e) + Ch(e,f,g) + 0x27b70a85 + W[32];
154	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
155	t1 = g + e1(d) + Ch(d,e,f) + 0x2e1b2138 + W[33];
156	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
157	t1 = f + e1(c) + Ch(c,d,e) + 0x4d2c6dfc + W[34];
158	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
159	t1 = e + e1(b) + Ch(b,c,d) + 0x53380d13 + W[35];
160	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
161	t1 = d + e1(a) + Ch(a,b,c) + 0x650a7354 + W[36];
162	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
163	t1 = c + e1(h) + Ch(h,a,b) + 0x766a0abb + W[37];
164	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
165	t1 = b + e1(g) + Ch(g,h,a) + 0x81c2c92e + W[38];
166	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
167	t1 = a + e1(f) + Ch(f,g,h) + 0x92722c85 + W[39];
168	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
169
170	t1 = h + e1(e) + Ch(e,f,g) + 0xa2bfe8a1 + W[40];
171	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
172	t1 = g + e1(d) + Ch(d,e,f) + 0xa81a664b + W[41];
173	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
174	t1 = f + e1(c) + Ch(c,d,e) + 0xc24b8b70 + W[42];
175	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
176	t1 = e + e1(b) + Ch(b,c,d) + 0xc76c51a3 + W[43];
177	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
178	t1 = d + e1(a) + Ch(a,b,c) + 0xd192e819 + W[44];
179	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
180	t1 = c + e1(h) + Ch(h,a,b) + 0xd6990624 + W[45];
181	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
182	t1 = b + e1(g) + Ch(g,h,a) + 0xf40e3585 + W[46];
183	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
184	t1 = a + e1(f) + Ch(f,g,h) + 0x106aa070 + W[47];
185	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
186
187	t1 = h + e1(e) + Ch(e,f,g) + 0x19a4c116 + W[48];
188	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
189	t1 = g + e1(d) + Ch(d,e,f) + 0x1e376c08 + W[49];
190	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
191	t1 = f + e1(c) + Ch(c,d,e) + 0x2748774c + W[50];
192	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
193	t1 = e + e1(b) + Ch(b,c,d) + 0x34b0bcb5 + W[51];
194	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
195	t1 = d + e1(a) + Ch(a,b,c) + 0x391c0cb3 + W[52];
196	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
197	t1 = c + e1(h) + Ch(h,a,b) + 0x4ed8aa4a + W[53];
198	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
199	t1 = b + e1(g) + Ch(g,h,a) + 0x5b9cca4f + W[54];
200	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
201	t1 = a + e1(f) + Ch(f,g,h) + 0x682e6ff3 + W[55];
202	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
203
204	t1 = h + e1(e) + Ch(e,f,g) + 0x748f82ee + W[56];
205	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
206	t1 = g + e1(d) + Ch(d,e,f) + 0x78a5636f + W[57];
207	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
208	t1 = f + e1(c) + Ch(c,d,e) + 0x84c87814 + W[58];
209	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
210	t1 = e + e1(b) + Ch(b,c,d) + 0x8cc70208 + W[59];
211	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
212	t1 = d + e1(a) + Ch(a,b,c) + 0x90befffa + W[60];
213	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
214	t1 = c + e1(h) + Ch(h,a,b) + 0xa4506ceb + W[61];
215	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
216	t1 = b + e1(g) + Ch(g,h,a) + 0xbef9a3f7 + W[62];
217	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
218	t1 = a + e1(f) + Ch(f,g,h) + 0xc67178f2 + W[63];
219	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
220
221	state[0] += a; state[1] += b; state[2] += c; state[3] += d;
222	state[4] += e; state[5] += f; state[6] += g; state[7] += h;
223
224	/* clear any sensitive info... */
225	a = b = c = d = e = f = g = h = t1 = t2 = 0;
226	memset(W, 0, 64 * sizeof(uint32_t));
227	}
228
25dfa848	229	void fio_sha256_init(struct fio_sha256_ctx *sctx)
cd14cc10 JA	230	{
	231	sctx->state[0] = H0;
	232	sctx->state[1] = H1;
	233	sctx->state[2] = H2;
	234	sctx->state[3] = H3;
	235	sctx->state[4] = H4;
	236	sctx->state[5] = H5;
	237	sctx->state[6] = H6;
	238	sctx->state[7] = H7;
f99d67f9	239	sctx->count = 0;
cd14cc10 JA	240	}
cd14cc10 JA	241
25dfa848 JA	242	void fio_sha256_update(struct fio_sha256_ctx sctx, const uint8_t data,
25dfa848 JA	243	unsigned int len)
cd14cc10	244	{
f99d67f9 JA	245	unsigned int partial, done;
f99d67f9 JA	246	const uint8_t *src;
cd14cc10	247
f99d67f9 JA	248	partial = sctx->count & 0x3f;
	249	sctx->count += len;
	250	done = 0;
	251	src = data;
cd14cc10	252
f99d67f9 JA	253	if ((partial + len) > 63) {
	254	if (partial) {
	255	done = -partial;
	256	memcpy(sctx->buf + partial, data, done + 64);
	257	src = sctx->buf;
	258	}
	259
	260	do {
	261	sha256_transform(sctx->state, src);
	262	done += 64;
	263	src = data + done;
	264	} while (done + 63 < len);
	265
	266	partial = 0;
cd14cc10	267	}
f99d67f9 JA	268	memcpy(sctx->buf + partial, src, len - done);
	269	}
	270
	271	void fio_sha256_final(struct fio_sha256_ctx *sctx)
	272	{
	273	uint64_t bits;
	274	unsigned int index, pad_len;
	275	int i;
	276	static const uint8_t padding[64] = { 0x80, };
cd14cc10	277
f99d67f9	278	/* Save number of bits */
900485d1	279	bits = (uint64_t) sctx->count << 3;
cd14cc10	280
f99d67f9 JA	281	/* Pad out to 56 mod 64. */
	282	index = sctx->count & 0x3f;
	283	pad_len = (index < 56) ? (56 - index) : ((64+56) - index);
	284	fio_sha256_update(sctx, padding, pad_len);
cd14cc10	285
f99d67f9 JA	286	/* Append length (before padding) */
	287	fio_sha256_update(sctx, (const uint8_t *)&bits, sizeof(bits));
	288
	289	/* Store state in digest */
	290	for (i = 0; i < 8; i++)
	291	sctx->buf[i] = sctx->state[i];
cd14cc10	292	}